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The largest monolith of granite in the world, El Capitan has several designated climbing routes, the majority of which are considered highly challenging. In fact, according to Big Wall Climbing by Doug Scott, until the late 1950s people believed that El Capitan was impossible to climb. After several failed attempts and a few setbacks, two free climbers recently conquered the formation’s Dawn Wall, which is widely considered one of the toughest ascents in the entire world.